It's been looking like a fingerprint scanner in the 5S is less and less likely, but the new logic board shots might shed new evidence that the fingerprint scanner will indeed make it in the new phone. Normally the iPhone 5 home button is connected via a two pin connector which is shown on the right pic. This is a simple two pin contact connector that just relays the on/off state of the home button. Looking at the same location in the new logic shot we see a 10 pin socket connector instead on the left pic. Now the only reason for this many pins is that something more advanced that carries data is connected to this socket. So this could be the fingerprint scanner that is integrated in the home button!